yaffs.net Git - yaffs-website/blob - web/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationBrowser.php

   1 <?php
   2
   3 namespace Drupal\language\Plugin\LanguageNegotiation;
   4
   5 use Drupal\Component\Utility\UserAgent;
   6 use Drupal\language\LanguageNegotiationMethodBase;
   7 use Symfony\Component\HttpFoundation\Request;
   8
   9 /**
  10  * Class for identifying language from the browser Accept-language HTTP header.
  11  *
  12  * @LanguageNegotiation(
  13  *   id = \Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationBrowser::METHOD_ID,
  14  *   weight = -2,
  15  *   name = @Translation("Browser"),
  16  *   description = @Translation("Language from the browser's language settings."),
  17  *   config_route_name = "language.negotiation_browser"
  18  * )
  19  */
  20 class LanguageNegotiationBrowser extends LanguageNegotiationMethodBase {
  21
  22   /**
  23    * The language negotiation method id.
  24    */
  25   const METHOD_ID = 'language-browser';
  26
  27   /**
  28    * {@inheritdoc}
  29    */
  30   public function getLangcode(Request $request = NULL) {
  31     $langcode = NULL;
  32
  33     if ($this->languageManager && $request && $request->server->get('HTTP_ACCEPT_LANGUAGE')) {
  34       $http_accept_language = $request->server->get('HTTP_ACCEPT_LANGUAGE');
  35       $langcodes = array_keys($this->languageManager->getLanguages());
  36       $mappings = $this->config->get('language.mappings')->get('map');
  37       $langcode = UserAgent::getBestMatchingLangcode($http_accept_language, $langcodes, $mappings);
  38       // Internal page cache with multiple languages and browser negotiation
  39       // could lead to wrong cached sites. Therefore disabling the internal
  40       // page cache.
  41       // @todo Solve more elegantly in https://www.drupal.org/node/2430335.
  42       \Drupal::service('page_cache_kill_switch')->trigger();
  43     }
  44
  45     return $langcode;
  46   }
  47
  48 }